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Installing DOHC F20b in bb6 CKF sensor problem? ECU pins missing?

Discussion in 'HYBRID -> BA-BB /CA-CD' started by eatricebb6, Oct 21, 2007.

  1. eatricebb6

    eatricebb6 New Member

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    Ok guys heres the deal!!
    Car is a stock 98 Honda prelude! (obd2a)
    Im going to run a JDM DOHC F20b in it.(obd2 as well)
    I was going to splice the CKF and CKP wires so i can run the F20b without swapping in a USDM oil pump with CKF sensor.(ckf and ckp are pins c1-c4,c11-c14)
    I went to splice the wires and for some reason my 98 prelude ecu harness is missing pin outputs c1 and c11 as if it were an OBD1 car.......But my stock H22 does have a crank fluctuation sensor....
    So i have
    JDM F20b in the car using the usdm obd2 harness and dizzy
    Usdm H22 external dizzy on the F20b
    obd2-obd1 conversion harness with chipped p06
    So using my stock prelude dizzy what can i do to bypass the crank signal? Or am i going to have to swap oil pumps to use the crank fluctuation sensor?

    THANKS
     
  2. Smooth587

    Smooth587 New Member

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    Hey, I need to help in this F20B swap. If the swap so far worked with you, and if so can you give me maybe help? :confused::confused::confused:
     
  3. efhondakid

    efhondakid My name is Byron. VIP

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    You = teh failz, check the date next time.
     
  4. pspec

    pspec Junior Member

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    Back from the dead.

    I am working on this right now. I am doing F20B swap into 1997 Accord EX. The F20B does not have sensors on the oil pump. My 1997 Accord motor and harness have sensors on the oil pump.

    I am trying to figure out where to run the wires from the oil pump to the distributor wires.

    I don't think Accords/Preludes have CKF. I think CKF sensor is a 2-wire sensor found on OBD2 integras.

    In my OBD2 PRELUDE service manual, it says the two sensors on the oil pump are TDC and CKP.

    CYP is found inside the distributor in both OBD1 and OBD2 cars.

    So I think I just need to run the wires for TDC and CKP into the distributor plug.

    I have not been able to find any info on Accord or Prelude having a CKF sensor, and I beleive it to be Integra/Civic equipment.
     
  5. BrutalB83

    BrutalB83 Brutal Moderator Moderator VIP

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    Holy crap dude, you're still trying to get this thing to run a year later?
     
  6. pspec

    pspec Junior Member

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    no im someone else
     
  7. BrutalB83

    BrutalB83 Brutal Moderator Moderator VIP

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    Oh ok...so you're resurrecting a dead thread...nice... :roll:
     
  8. pspec

    pspec Junior Member

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    If you don't have any info to add, why bother posting? I know its a dead thread. There is not very many people that know anything about F20B swap. There is a chance that this guy finally figured it out, and there is chance that he may know what I need to do.
     
  9. pspec

    pspec Junior Member

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    Anyway here is what I have figured out so far

    Prelude and Accord do not have CKF!

    CKF is a sensor found on OBD2 civics and integras. I have not seen this sensor on anything other than B or D series engines.

    The sensors on the Accord and Prelude oil pumps are CKP and TDC.

    There is so much misinformation about this online that it confuses everyone. There are 3 sensors on Accord/Prelude distributor or crank depending on the year range

    CKP - Crank position
    CYP - Cylinder position
    TDC - Top dead center

    On OBD1 era Accord/Prelude in the US these 3 are all found in the distributor
    On OBD2 era Accord/Prelude in the US CKP and TDC are found on the oil pump. CYP is always found in the distributor.

    JDM OBD2 era Accord/Prelude motors have OBD1 style distributors with all 3 sensors in the distributor

    My F20B is 1997-2001 year range and has all 3 in the distributor. I had to run the 4 wires from my oil pump plug into the F20B distributor plug. The F20B plug has 8 wires and I don't have a spot to run the blue RPM wire for the tach through the plug. I need a 9 wire plug I guess?
     
  10. BrutalB83

    BrutalB83 Brutal Moderator Moderator VIP

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    The dude made ONE post here, 15 months ago. I kinda doubt he's coming back at this point...
     
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